The order can contain several reservations.
Reservation is the time of the visit itself and its details.
For example, how many seats are booked, by what tariff, etc.
Booking has a unique code format A1B2C3.
Order - this is information about who and when to book.
The order includes contact information, payments, confirmation status, etc.
The order has a number of nine random digits.
If you draw an analogy of reservations with an ordinary online store, then the order is a basket, and the reservation is a commodity.
You can create order tables, reservations and merged tables.
In the last under each line of the order you will see the lines of his reservations.